... 1055, AISI1085 Size:1/8" Grade: G200, G500,G1000 ItemBicycle steel ballMaterialAISI 1010-1015, AISI 1055, AISI1085Size1/8" , 5/32 ... ", 3/16", 7/32", 1/4", 4mm, 5mm, 6mmGradeG200, G500, G1000HardnessHRC60ApplicationCycle ... packingCertificationISO 9002: 2000Place of originalShandong province, ChinaDelivery30 days Factory ProductionPacking Carbon Steel Ball